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-rw-r--r--drivers/bluetooth/btrtl.c1092
1 files changed, 1092 insertions, 0 deletions
diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
new file mode 100644
index 000000000..ead632595
--- /dev/null
+++ b/drivers/bluetooth/btrtl.c
@@ -0,0 +1,1092 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Bluetooth support for Realtek devices
+ *
+ * Copyright (C) 2015 Endless Mobile, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/firmware.h>
+#include <asm/unaligned.h>
+#include <linux/usb.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "btrtl.h"
+
+#define VERSION "0.1"
+
+#define RTL_CHIP_8723CS_CG 3
+#define RTL_CHIP_8723CS_VF 4
+#define RTL_CHIP_8723CS_XX 5
+#define RTL_EPATCH_SIGNATURE "Realtech"
+#define RTL_ROM_LMP_8703B 0x8703
+#define RTL_ROM_LMP_8723A 0x1200
+#define RTL_ROM_LMP_8723B 0x8723
+#define RTL_ROM_LMP_8821A 0x8821
+#define RTL_ROM_LMP_8761A 0x8761
+#define RTL_ROM_LMP_8822B 0x8822
+#define RTL_ROM_LMP_8852A 0x8852
+#define RTL_ROM_LMP_8851B 0x8851
+#define RTL_CONFIG_MAGIC 0x8723ab55
+
+#define IC_MATCH_FL_LMPSUBV (1 << 0)
+#define IC_MATCH_FL_HCIREV (1 << 1)
+#define IC_MATCH_FL_HCIVER (1 << 2)
+#define IC_MATCH_FL_HCIBUS (1 << 3)
+#define IC_MATCH_FL_CHIP_TYPE (1 << 4)
+#define IC_INFO(lmps, hcir, hciv, bus) \
+ .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV | \
+ IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS, \
+ .lmp_subver = (lmps), \
+ .hci_rev = (hcir), \
+ .hci_ver = (hciv), \
+ .hci_bus = (bus)
+
+enum btrtl_chip_id {
+ CHIP_ID_8723A,
+ CHIP_ID_8723B,
+ CHIP_ID_8821A,
+ CHIP_ID_8761A,
+ CHIP_ID_8822B = 8,
+ CHIP_ID_8723D,
+ CHIP_ID_8821C,
+ CHIP_ID_8822C = 13,
+ CHIP_ID_8761B,
+ CHIP_ID_8852A = 18,
+ CHIP_ID_8852B = 20,
+ CHIP_ID_8852C = 25,
+ CHIP_ID_8851B = 36,
+};
+
+struct id_table {
+ __u16 match_flags;
+ __u16 lmp_subver;
+ __u16 hci_rev;
+ __u8 hci_ver;
+ __u8 hci_bus;
+ __u8 chip_type;
+ bool config_needed;
+ bool has_rom_version;
+ bool has_msft_ext;
+ char *fw_name;
+ char *cfg_name;
+};
+
+struct btrtl_device_info {
+ const struct id_table *ic_info;
+ u8 rom_version;
+ u8 *fw_data;
+ int fw_len;
+ u8 *cfg_data;
+ int cfg_len;
+ bool drop_fw;
+ int project_id;
+};
+
+static const struct id_table ic_id_table[] = {
+ /* 8723A */
+ { IC_INFO(RTL_ROM_LMP_8723A, 0xb, 0x6, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = false,
+ .fw_name = "rtl_bt/rtl8723a_fw.bin",
+ .cfg_name = NULL },
+
+ /* 8723BS */
+ { IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_UART),
+ .config_needed = true,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723bs_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723bs_config" },
+
+ /* 8723B */
+ { IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723b_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723b_config" },
+
+ /* 8723CS-CG */
+ { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
+ IC_MATCH_FL_HCIBUS,
+ .lmp_subver = RTL_ROM_LMP_8703B,
+ .chip_type = RTL_CHIP_8723CS_CG,
+ .hci_bus = HCI_UART,
+ .config_needed = true,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723cs_cg_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723cs_cg_config" },
+
+ /* 8723CS-VF */
+ { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
+ IC_MATCH_FL_HCIBUS,
+ .lmp_subver = RTL_ROM_LMP_8703B,
+ .chip_type = RTL_CHIP_8723CS_VF,
+ .hci_bus = HCI_UART,
+ .config_needed = true,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723cs_vf_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723cs_vf_config" },
+
+ /* 8723CS-XX */
+ { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
+ IC_MATCH_FL_HCIBUS,
+ .lmp_subver = RTL_ROM_LMP_8703B,
+ .chip_type = RTL_CHIP_8723CS_XX,
+ .hci_bus = HCI_UART,
+ .config_needed = true,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723cs_xx_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723cs_xx_config" },
+
+ /* 8723D */
+ { IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_USB),
+ .config_needed = true,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723d_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723d_config" },
+
+ /* 8723DS */
+ { IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_UART),
+ .config_needed = true,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723ds_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723ds_config" },
+
+ /* 8821A */
+ { IC_INFO(RTL_ROM_LMP_8821A, 0xa, 0x6, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8821a_fw.bin",
+ .cfg_name = "rtl_bt/rtl8821a_config" },
+
+ /* 8821C */
+ { IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .has_msft_ext = true,
+ .fw_name = "rtl_bt/rtl8821c_fw.bin",
+ .cfg_name = "rtl_bt/rtl8821c_config" },
+
+ /* 8761A */
+ { IC_INFO(RTL_ROM_LMP_8761A, 0xa, 0x6, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8761a_fw.bin",
+ .cfg_name = "rtl_bt/rtl8761a_config" },
+
+ /* 8761B */
+ { IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_UART),
+ .config_needed = false,
+ .has_rom_version = true,
+ .has_msft_ext = true,
+ .fw_name = "rtl_bt/rtl8761b_fw.bin",
+ .cfg_name = "rtl_bt/rtl8761b_config" },
+
+ /* 8761BU */
+ { IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8761bu_fw.bin",
+ .cfg_name = "rtl_bt/rtl8761bu_config" },
+
+ /* 8822C with UART interface */
+ { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0x8, HCI_UART),
+ .config_needed = true,
+ .has_rom_version = true,
+ .has_msft_ext = true,
+ .fw_name = "rtl_bt/rtl8822cs_fw.bin",
+ .cfg_name = "rtl_bt/rtl8822cs_config" },
+
+ /* 8822C with UART interface */
+ { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_UART),
+ .config_needed = true,
+ .has_rom_version = true,
+ .has_msft_ext = true,
+ .fw_name = "rtl_bt/rtl8822cs_fw.bin",
+ .cfg_name = "rtl_bt/rtl8822cs_config" },
+
+ /* 8822C with USB interface */
+ { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .has_msft_ext = true,
+ .fw_name = "rtl_bt/rtl8822cu_fw.bin",
+ .cfg_name = "rtl_bt/rtl8822cu_config" },
+
+ /* 8822B */
+ { IC_INFO(RTL_ROM_LMP_8822B, 0xb, 0x7, HCI_USB),
+ .config_needed = true,
+ .has_rom_version = true,
+ .has_msft_ext = true,
+ .fw_name = "rtl_bt/rtl8822b_fw.bin",
+ .cfg_name = "rtl_bt/rtl8822b_config" },
+
+ /* 8852A */
+ { IC_INFO(RTL_ROM_LMP_8852A, 0xa, 0xb, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .has_msft_ext = true,
+ .fw_name = "rtl_bt/rtl8852au_fw.bin",
+ .cfg_name = "rtl_bt/rtl8852au_config" },
+
+ /* 8852B */
+ { IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .has_msft_ext = true,
+ .fw_name = "rtl_bt/rtl8852bu_fw.bin",
+ .cfg_name = "rtl_bt/rtl8852bu_config" },
+
+ /* 8852C */
+ { IC_INFO(RTL_ROM_LMP_8852A, 0xc, 0xc, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .has_msft_ext = true,
+ .fw_name = "rtl_bt/rtl8852cu_fw.bin",
+ .cfg_name = "rtl_bt/rtl8852cu_config" },
+
+ /* 8851B */
+ { IC_INFO(RTL_ROM_LMP_8851B, 0xb, 0xc, HCI_USB),
+ .config_needed = false,
+ .has_rom_version = true,
+ .has_msft_ext = false,
+ .fw_name = "rtl_bt/rtl8851bu_fw.bin",
+ .cfg_name = "rtl_bt/rtl8851bu_config" },
+ };
+
+static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
+ u8 hci_ver, u8 hci_bus,
+ u8 chip_type)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) {
+ if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) &&
+ (ic_id_table[i].lmp_subver != lmp_subver))
+ continue;
+ if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) &&
+ (ic_id_table[i].hci_rev != hci_rev))
+ continue;
+ if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) &&
+ (ic_id_table[i].hci_ver != hci_ver))
+ continue;
+ if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) &&
+ (ic_id_table[i].hci_bus != hci_bus))
+ continue;
+ if ((ic_id_table[i].match_flags & IC_MATCH_FL_CHIP_TYPE) &&
+ (ic_id_table[i].chip_type != chip_type))
+ continue;
+
+ break;
+ }
+ if (i >= ARRAY_SIZE(ic_id_table))
+ return NULL;
+
+ return &ic_id_table[i];
+}
+
+static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+
+ skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION failed (%ld)",
+ PTR_ERR(skb));
+ return skb;
+ }
+
+ if (skb->len != sizeof(struct hci_rp_read_local_version)) {
+ rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION event length mismatch");
+ kfree_skb(skb);
+ return ERR_PTR(-EIO);
+ }
+
+ return skb;
+}
+
+static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
+{
+ struct rtl_rom_version_evt *rom_version;
+ struct sk_buff *skb;
+
+ /* Read RTL ROM version command */
+ skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ rtl_dev_err(hdev, "Read ROM version failed (%ld)",
+ PTR_ERR(skb));
+ return PTR_ERR(skb);
+ }
+
+ if (skb->len != sizeof(*rom_version)) {
+ rtl_dev_err(hdev, "version event length mismatch");
+ kfree_skb(skb);
+ return -EIO;
+ }
+
+ rom_version = (struct rtl_rom_version_evt *)skb->data;
+ rtl_dev_info(hdev, "rom_version status=%x version=%x",
+ rom_version->status, rom_version->version);
+
+ *version = rom_version->version;
+
+ kfree_skb(skb);
+ return 0;
+}
+
+static int rtlbt_parse_firmware(struct hci_dev *hdev,
+ struct btrtl_device_info *btrtl_dev,
+ unsigned char **_buf)
+{
+ static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
+ struct rtl_epatch_header *epatch_info;
+ unsigned char *buf;
+ int i, len;
+ size_t min_size;
+ u8 opcode, length, data;
+ int project_id = -1;
+ const unsigned char *fwptr, *chip_id_base;
+ const unsigned char *patch_length_base, *patch_offset_base;
+ u32 patch_offset = 0;
+ u16 patch_length, num_patches;
+ static const struct {
+ __u16 lmp_subver;
+ __u8 id;
+ } project_id_to_lmp_subver[] = {
+ { RTL_ROM_LMP_8723A, 0 },
+ { RTL_ROM_LMP_8723B, 1 },
+ { RTL_ROM_LMP_8821A, 2 },
+ { RTL_ROM_LMP_8761A, 3 },
+ { RTL_ROM_LMP_8703B, 7 },
+ { RTL_ROM_LMP_8822B, 8 },
+ { RTL_ROM_LMP_8723B, 9 }, /* 8723D */
+ { RTL_ROM_LMP_8821A, 10 }, /* 8821C */
+ { RTL_ROM_LMP_8822B, 13 }, /* 8822C */
+ { RTL_ROM_LMP_8761A, 14 }, /* 8761B */
+ { RTL_ROM_LMP_8852A, 18 }, /* 8852A */
+ { RTL_ROM_LMP_8852A, 20 }, /* 8852B */
+ { RTL_ROM_LMP_8852A, 25 }, /* 8852C */
+ { RTL_ROM_LMP_8851B, 36 }, /* 8851B */
+ };
+
+ min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3;
+ if (btrtl_dev->fw_len < min_size)
+ return -EINVAL;
+
+ fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig);
+ if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
+ rtl_dev_err(hdev, "extension section signature mismatch");
+ return -EINVAL;
+ }
+
+ /* Loop from the end of the firmware parsing instructions, until
+ * we find an instruction that identifies the "project ID" for the
+ * hardware supported by this firwmare file.
+ * Once we have that, we double-check that project_id is suitable
+ * for the hardware we are working with.
+ */
+ while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) {
+ opcode = *--fwptr;
+ length = *--fwptr;
+ data = *--fwptr;
+
+ BT_DBG("check op=%x len=%x data=%x", opcode, length, data);
+
+ if (opcode == 0xff) /* EOF */
+ break;
+
+ if (length == 0) {
+ rtl_dev_err(hdev, "found instruction with length 0");
+ return -EINVAL;
+ }
+
+ if (opcode == 0 && length == 1) {
+ project_id = data;
+ break;
+ }
+
+ fwptr -= length;
+ }
+
+ if (project_id < 0) {
+ rtl_dev_err(hdev, "failed to find version instruction");
+ return -EINVAL;
+ }
+
+ /* Find project_id in table */
+ for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) {
+ if (project_id == project_id_to_lmp_subver[i].id) {
+ btrtl_dev->project_id = project_id;
+ break;
+ }
+ }
+
+ if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) {
+ rtl_dev_err(hdev, "unknown project id %d", project_id);
+ return -EINVAL;
+ }
+
+ if (btrtl_dev->ic_info->lmp_subver !=
+ project_id_to_lmp_subver[i].lmp_subver) {
+ rtl_dev_err(hdev, "firmware is for %x but this is a %x",
+ project_id_to_lmp_subver[i].lmp_subver,
+ btrtl_dev->ic_info->lmp_subver);
+ return -EINVAL;
+ }
+
+ epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data;
+ if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) {
+ rtl_dev_err(hdev, "bad EPATCH signature");
+ return -EINVAL;
+ }
+
+ num_patches = le16_to_cpu(epatch_info->num_patches);
+ BT_DBG("fw_version=%x, num_patches=%d",
+ le32_to_cpu(epatch_info->fw_version), num_patches);
+
+ /* After the rtl_epatch_header there is a funky patch metadata section.
+ * Assuming 2 patches, the layout is:
+ * ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2
+ *
+ * Find the right patch for this chip.
+ */
+ min_size += 8 * num_patches;
+ if (btrtl_dev->fw_len < min_size)
+ return -EINVAL;
+
+ chip_id_base = btrtl_dev->fw_data + sizeof(struct rtl_epatch_header);
+ patch_length_base = chip_id_base + (sizeof(u16) * num_patches);
+ patch_offset_base = patch_length_base + (sizeof(u16) * num_patches);
+ for (i = 0; i < num_patches; i++) {
+ u16 chip_id = get_unaligned_le16(chip_id_base +
+ (i * sizeof(u16)));
+ if (chip_id == btrtl_dev->rom_version + 1) {
+ patch_length = get_unaligned_le16(patch_length_base +
+ (i * sizeof(u16)));
+ patch_offset = get_unaligned_le32(patch_offset_base +
+ (i * sizeof(u32)));
+ break;
+ }
+ }
+
+ if (!patch_offset) {
+ rtl_dev_err(hdev, "didn't find patch for chip id %d",
+ btrtl_dev->rom_version);
+ return -EINVAL;
+ }
+
+ BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i);
+ min_size = patch_offset + patch_length;
+ if (btrtl_dev->fw_len < min_size)
+ return -EINVAL;
+
+ /* Copy the firmware into a new buffer and write the version at
+ * the end.
+ */
+ len = patch_length;
+ buf = kvmalloc(patch_length, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ memcpy(buf, btrtl_dev->fw_data + patch_offset, patch_length - 4);
+ memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4);
+
+ *_buf = buf;
+ return len;
+}
+
+static int rtl_download_firmware(struct hci_dev *hdev,
+ const unsigned char *data, int fw_len)
+{
+ struct rtl_download_cmd *dl_cmd;
+ int frag_num = fw_len / RTL_FRAG_LEN + 1;
+ int frag_len = RTL_FRAG_LEN;
+ int ret = 0;
+ int i;
+ struct sk_buff *skb;
+ struct hci_rp_read_local_version *rp;
+
+ dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL);
+ if (!dl_cmd)
+ return -ENOMEM;
+
+ for (i = 0; i < frag_num; i++) {
+ struct sk_buff *skb;
+
+ BT_DBG("download fw (%d/%d)", i, frag_num);
+
+ if (i > 0x7f)
+ dl_cmd->index = (i & 0x7f) + 1;
+ else
+ dl_cmd->index = i;
+
+ if (i == (frag_num - 1)) {
+ dl_cmd->index |= 0x80; /* data end */
+ frag_len = fw_len % RTL_FRAG_LEN;
+ }
+ memcpy(dl_cmd->data, data, frag_len);
+
+ /* Send download command */
+ skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ rtl_dev_err(hdev, "download fw command failed (%ld)",
+ PTR_ERR(skb));
+ ret = PTR_ERR(skb);
+ goto out;
+ }
+
+ if (skb->len != sizeof(struct rtl_download_response)) {
+ rtl_dev_err(hdev, "download fw event length mismatch");
+ kfree_skb(skb);
+ ret = -EIO;
+ goto out;
+ }
+
+ kfree_skb(skb);
+ data += RTL_FRAG_LEN;
+ }
+
+ skb = btrtl_read_local_version(hdev);
+ if (IS_ERR(skb)) {
+ ret = PTR_ERR(skb);
+ rtl_dev_err(hdev, "read local version failed");
+ goto out;
+ }
+
+ rp = (struct hci_rp_read_local_version *)skb->data;
+ rtl_dev_info(hdev, "fw version 0x%04x%04x",
+ __le16_to_cpu(rp->hci_rev), __le16_to_cpu(rp->lmp_subver));
+ kfree_skb(skb);
+
+out:
+ kfree(dl_cmd);
+ return ret;
+}
+
+static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff)
+{
+ const struct firmware *fw;
+ int ret;
+
+ rtl_dev_info(hdev, "loading %s", name);
+ ret = request_firmware(&fw, name, &hdev->dev);
+ if (ret < 0)
+ return ret;
+ ret = fw->size;
+ *buff = kvmalloc(fw->size, GFP_KERNEL);
+ if (*buff)
+ memcpy(*buff, fw->data, ret);
+ else
+ ret = -ENOMEM;
+
+ release_firmware(fw);
+
+ return ret;
+}
+
+static int btrtl_setup_rtl8723a(struct hci_dev *hdev,
+ struct btrtl_device_info *btrtl_dev)
+{
+ if (btrtl_dev->fw_len < 8)
+ return -EINVAL;
+
+ /* Check that the firmware doesn't have the epatch signature
+ * (which is only for RTL8723B and newer).
+ */
+ if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) {
+ rtl_dev_err(hdev, "unexpected EPATCH signature!");
+ return -EINVAL;
+ }
+
+ return rtl_download_firmware(hdev, btrtl_dev->fw_data,
+ btrtl_dev->fw_len);
+}
+
+static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
+ struct btrtl_device_info *btrtl_dev)
+{
+ unsigned char *fw_data = NULL;
+ int ret;
+ u8 *tbuff;
+
+ ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data);
+ if (ret < 0)
+ goto out;
+
+ if (btrtl_dev->cfg_len > 0) {
+ tbuff = kvzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL);
+ if (!tbuff) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ memcpy(tbuff, fw_data, ret);
+ kvfree(fw_data);
+
+ memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len);
+ ret += btrtl_dev->cfg_len;
+
+ fw_data = tbuff;
+ }
+
+ rtl_dev_info(hdev, "cfg_sz %d, total sz %d", btrtl_dev->cfg_len, ret);
+
+ ret = rtl_download_firmware(hdev, fw_data, ret);
+
+out:
+ kvfree(fw_data);
+ return ret;
+}
+
+static bool rtl_has_chip_type(u16 lmp_subver)
+{
+ switch (lmp_subver) {
+ case RTL_ROM_LMP_8703B:
+ return true;
+ default:
+ break;
+ }
+
+ return false;
+}
+
+static int rtl_read_chip_type(struct hci_dev *hdev, u8 *type)
+{
+ struct rtl_chip_type_evt *chip_type;
+ struct sk_buff *skb;
+ const unsigned char cmd_buf[] = {0x00, 0x94, 0xa0, 0x00, 0xb0};
+
+ /* Read RTL chip type command */
+ skb = __hci_cmd_sync(hdev, 0xfc61, 5, cmd_buf, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ rtl_dev_err(hdev, "Read chip type failed (%ld)",
+ PTR_ERR(skb));
+ return PTR_ERR(skb);
+ }
+
+ chip_type = skb_pull_data(skb, sizeof(*chip_type));
+ if (!chip_type) {
+ rtl_dev_err(hdev, "RTL chip type event length mismatch");
+ kfree_skb(skb);
+ return -EIO;
+ }
+
+ rtl_dev_info(hdev, "chip_type status=%x type=%x",
+ chip_type->status, chip_type->type);
+
+ *type = chip_type->type & 0x0f;
+
+ kfree_skb(skb);
+ return 0;
+}
+
+void btrtl_free(struct btrtl_device_info *btrtl_dev)
+{
+ kvfree(btrtl_dev->fw_data);
+ kvfree(btrtl_dev->cfg_data);
+ kfree(btrtl_dev);
+}
+EXPORT_SYMBOL_GPL(btrtl_free);
+
+struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
+ const char *postfix)
+{
+ struct btrtl_device_info *btrtl_dev;
+ struct sk_buff *skb;
+ struct hci_rp_read_local_version *resp;
+ char cfg_name[40];
+ u16 hci_rev, lmp_subver;
+ u8 hci_ver, chip_type = 0;
+ int ret;
+ u16 opcode;
+ u8 cmd[2];
+
+ btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL);
+ if (!btrtl_dev) {
+ ret = -ENOMEM;
+ goto err_alloc;
+ }
+
+ skb = btrtl_read_local_version(hdev);
+ if (IS_ERR(skb)) {
+ ret = PTR_ERR(skb);
+ goto err_free;
+ }
+
+ resp = (struct hci_rp_read_local_version *)skb->data;
+ rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x",
+ resp->hci_ver, resp->hci_rev,
+ resp->lmp_ver, resp->lmp_subver);
+
+ hci_ver = resp->hci_ver;
+ hci_rev = le16_to_cpu(resp->hci_rev);
+ lmp_subver = le16_to_cpu(resp->lmp_subver);
+
+ if (rtl_has_chip_type(lmp_subver)) {
+ ret = rtl_read_chip_type(hdev, &chip_type);
+ if (ret)
+ goto err_free;
+ }
+
+ btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
+ hdev->bus, chip_type);
+
+ if (!btrtl_dev->ic_info)
+ btrtl_dev->drop_fw = true;
+
+ if (btrtl_dev->drop_fw) {
+ opcode = hci_opcode_pack(0x3f, 0x66);
+ cmd[0] = opcode & 0xff;
+ cmd[1] = opcode >> 8;
+
+ skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
+ if (!skb)
+ goto out_free;
+
+ skb_put_data(skb, cmd, sizeof(cmd));
+ hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
+
+ hdev->send(hdev, skb);
+
+ /* Ensure the above vendor command is sent to controller and
+ * process has done.
+ */
+ msleep(200);
+
+ /* Read the local version again. Expect to have the vanilla
+ * version as cold boot.
+ */
+ skb = btrtl_read_local_version(hdev);
+ if (IS_ERR(skb)) {
+ ret = PTR_ERR(skb);
+ goto err_free;
+ }
+
+ resp = (struct hci_rp_read_local_version *)skb->data;
+ rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x",
+ resp->hci_ver, resp->hci_rev,
+ resp->lmp_ver, resp->lmp_subver);
+
+ hci_ver = resp->hci_ver;
+ hci_rev = le16_to_cpu(resp->hci_rev);
+ lmp_subver = le16_to_cpu(resp->lmp_subver);
+
+ btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
+ hdev->bus, chip_type);
+ }
+out_free:
+ kfree_skb(skb);
+
+ if (!btrtl_dev->ic_info) {
+ rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x",
+ lmp_subver, hci_rev, hci_ver);
+ return btrtl_dev;
+ }
+
+ if (btrtl_dev->ic_info->has_rom_version) {
+ ret = rtl_read_rom_version(hdev, &btrtl_dev->rom_version);
+ if (ret)
+ goto err_free;
+ }
+
+ btrtl_dev->fw_len = rtl_load_file(hdev, btrtl_dev->ic_info->fw_name,
+ &btrtl_dev->fw_data);
+ if (btrtl_dev->fw_len < 0) {
+ rtl_dev_err(hdev, "firmware file %s not found",
+ btrtl_dev->ic_info->fw_name);
+ ret = btrtl_dev->fw_len;
+ goto err_free;
+ }
+
+ if (btrtl_dev->ic_info->cfg_name) {
+ if (postfix) {
+ snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin",
+ btrtl_dev->ic_info->cfg_name, postfix);
+ } else {
+ snprintf(cfg_name, sizeof(cfg_name), "%s.bin",
+ btrtl_dev->ic_info->cfg_name);
+ }
+ btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name,
+ &btrtl_dev->cfg_data);
+ if (btrtl_dev->ic_info->config_needed &&
+ btrtl_dev->cfg_len <= 0) {
+ rtl_dev_err(hdev, "mandatory config file %s not found",
+ btrtl_dev->ic_info->cfg_name);
+ ret = btrtl_dev->cfg_len;
+ goto err_free;
+ }
+ }
+
+ /* The following chips supports the Microsoft vendor extension,
+ * therefore set the corresponding VsMsftOpCode.
+ */
+ if (btrtl_dev->ic_info->has_msft_ext)
+ hci_set_msft_opcode(hdev, 0xFCF0);
+
+ return btrtl_dev;
+
+err_free:
+ btrtl_free(btrtl_dev);
+err_alloc:
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(btrtl_initialize);
+
+int btrtl_download_firmware(struct hci_dev *hdev,
+ struct btrtl_device_info *btrtl_dev)
+{
+ /* Match a set of subver values that correspond to stock firmware,
+ * which is not compatible with standard btusb.
+ * If matched, upload an alternative firmware that does conform to
+ * standard btusb. Once that firmware is uploaded, the subver changes
+ * to a different value.
+ */
+ if (!btrtl_dev->ic_info) {
+ rtl_dev_info(hdev, "assuming no firmware upload needed");
+ return 0;
+ }
+
+ switch (btrtl_dev->ic_info->lmp_subver) {
+ case RTL_ROM_LMP_8723A:
+ return btrtl_setup_rtl8723a(hdev, btrtl_dev);
+ case RTL_ROM_LMP_8723B:
+ case RTL_ROM_LMP_8821A:
+ case RTL_ROM_LMP_8761A:
+ case RTL_ROM_LMP_8822B:
+ case RTL_ROM_LMP_8852A:
+ case RTL_ROM_LMP_8703B:
+ case RTL_ROM_LMP_8851B:
+ return btrtl_setup_rtl8723b(hdev, btrtl_dev);
+ default:
+ rtl_dev_info(hdev, "assuming no firmware upload needed");
+ return 0;
+ }
+}
+EXPORT_SYMBOL_GPL(btrtl_download_firmware);
+
+void btrtl_set_quirks(struct hci_dev *hdev, struct btrtl_device_info *btrtl_dev)
+{
+ /* Enable controller to do both LE scan and BR/EDR inquiry
+ * simultaneously.
+ */
+ set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
+
+ /* Enable central-peripheral role (able to create new connections with
+ * an existing connection in slave role).
+ */
+ /* Enable WBS supported for the specific Realtek devices. */
+ switch (btrtl_dev->project_id) {
+ case CHIP_ID_8822C:
+ case CHIP_ID_8852A:
+ case CHIP_ID_8852B:
+ case CHIP_ID_8852C:
+ case CHIP_ID_8851B:
+ set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
+ set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
+ hci_set_aosp_capable(hdev);
+ break;
+ default:
+ rtl_dev_dbg(hdev, "Central-peripheral role not enabled.");
+ rtl_dev_dbg(hdev, "WBS supported not enabled.");
+ break;
+ }
+
+ if (!btrtl_dev->ic_info)
+ return;
+
+ switch (btrtl_dev->ic_info->lmp_subver) {
+ case RTL_ROM_LMP_8703B:
+ /* 8723CS reports two pages for local ext features,
+ * but it doesn't support any features from page 2 -
+ * it either responds with garbage or with error status
+ */
+ set_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2,
+ &hdev->quirks);
+ break;
+ default:
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(btrtl_set_quirks);
+
+int btrtl_setup_realtek(struct hci_dev *hdev)
+{
+ struct btrtl_device_info *btrtl_dev;
+ int ret;
+
+ btrtl_dev = btrtl_initialize(hdev, NULL);
+ if (IS_ERR(btrtl_dev))
+ return PTR_ERR(btrtl_dev);
+
+ ret = btrtl_download_firmware(hdev, btrtl_dev);
+
+ btrtl_set_quirks(hdev, btrtl_dev);
+
+ btrtl_free(btrtl_dev);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
+
+int btrtl_shutdown_realtek(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+ int ret;
+
+ /* According to the vendor driver, BT must be reset on close to avoid
+ * firmware crash.
+ */
+ skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ ret = PTR_ERR(skb);
+ bt_dev_err(hdev, "HCI reset during shutdown failed");
+ return ret;
+ }
+ kfree_skb(skb);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btrtl_shutdown_realtek);
+
+static unsigned int btrtl_convert_baudrate(u32 device_baudrate)
+{
+ switch (device_baudrate) {
+ case 0x0252a00a:
+ return 230400;
+
+ case 0x05f75004:
+ return 921600;
+
+ case 0x00005004:
+ return 1000000;
+
+ case 0x04928002:
+ case 0x01128002:
+ return 1500000;
+
+ case 0x00005002:
+ return 2000000;
+
+ case 0x0000b001:
+ return 2500000;
+
+ case 0x04928001:
+ return 3000000;
+
+ case 0x052a6001:
+ return 3500000;
+
+ case 0x00005001:
+ return 4000000;
+
+ case 0x0252c014:
+ default:
+ return 115200;
+ }
+}
+
+int btrtl_get_uart_settings(struct hci_dev *hdev,
+ struct btrtl_device_info *btrtl_dev,
+ unsigned int *controller_baudrate,
+ u32 *device_baudrate, bool *flow_control)
+{
+ struct rtl_vendor_config *config;
+ struct rtl_vendor_config_entry *entry;
+ int i, total_data_len;
+ bool found = false;
+
+ total_data_len = btrtl_dev->cfg_len - sizeof(*config);
+ if (total_data_len <= 0) {
+ rtl_dev_warn(hdev, "no config loaded");
+ return -EINVAL;
+ }
+
+ config = (struct rtl_vendor_config *)btrtl_dev->cfg_data;
+ if (le32_to_cpu(config->signature) != RTL_CONFIG_MAGIC) {
+ rtl_dev_err(hdev, "invalid config magic");
+ return -EINVAL;
+ }
+
+ if (total_data_len < le16_to_cpu(config->total_len)) {
+ rtl_dev_err(hdev, "config is too short");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < total_data_len; ) {
+ entry = ((void *)config->entry) + i;
+
+ switch (le16_to_cpu(entry->offset)) {
+ case 0xc:
+ if (entry->len < sizeof(*device_baudrate)) {
+ rtl_dev_err(hdev, "invalid UART config entry");
+ return -EINVAL;
+ }
+
+ *device_baudrate = get_unaligned_le32(entry->data);
+ *controller_baudrate = btrtl_convert_baudrate(
+ *device_baudrate);
+
+ if (entry->len >= 13)
+ *flow_control = !!(entry->data[12] & BIT(2));
+ else
+ *flow_control = false;
+
+ found = true;
+ break;
+
+ default:
+ rtl_dev_dbg(hdev, "skipping config entry 0x%x (len %u)",
+ le16_to_cpu(entry->offset), entry->len);
+ break;
+ }
+
+ i += sizeof(*entry) + entry->len;
+ }
+
+ if (!found) {
+ rtl_dev_err(hdev, "no UART config entry found");
+ return -ENOENT;
+ }
+
+ rtl_dev_dbg(hdev, "device baudrate = 0x%08x", *device_baudrate);
+ rtl_dev_dbg(hdev, "controller baudrate = %u", *controller_baudrate);
+ rtl_dev_dbg(hdev, "flow control %d", *flow_control);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btrtl_get_uart_settings);
+
+MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>");
+MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_cg_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_cg_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_vf_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_vf_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_xx_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_xx_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8852au_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8852au_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8852bu_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8852bu_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8852cu_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8852cu_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8851bu_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8851bu_config.bin");